Investigations into the unexpected Delta-V increases during the Earth gravity assists of Galileo and NEAR

Antreasian, P. G.; Guinn, J.

doi:10.2514/6.1998-4287

Cited by 31 publications

(84 citation statements)

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“…Scattering of the two-way radio signal by free ionospheric electrons is less at the higher frequency, although systematic and random effects from atmospheric refraction limit the X-Band tracking accuracy. Nevertheless, the post-perigee residuals (Antreasian & Guinn 1998) show a clear asymptotic bias of 13.51 mm s −1 (see Fig. 2).…”

Section: Earth Flyby Anomalymentioning

confidence: 93%

Astrometric solar-system anomalies

Anderson

Nieto

2009

Proc. IAU

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Section: Earth Flyby Anomalymentioning

confidence: 93%

Astrometric solar-system anomalies

Anderson

Nieto

2009

Proc. IAU

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“…Also estimates of the influence of the Moon including Moon oblateness, the Sun, other planets, relativistic effects, and indirect oblateness of the Earth have been shown to be order of magnitude smaller than the observed effect [33]. None of these disturbing effects could explain the flyby-anomaly.…”

Section: Magnetic Momentmentioning

confidence: 94%

“…As told in [33] none of these could explain the flyby-anomaly. Being so large and so near to the Earth, the expansion of the universe should play no role for this anomaly.…”

Section: Explanations From "New Physics"mentioning

confidence: 98%

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Is the Physics Within the Solar System Really Understood?

Lämmerzahl

Preuss

Dittus

2008

Astrophysics and Space Science Library

111

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A collection is made of presently unexplained phenomena within our Solar system and in the universe. These phenomena are (i) the Pioneer anomaly, (ii) the flyby anomaly, (iii) the increase of the Astronomical Unit, (iv) the quadrupole and octupole anomaly, and (v) Dark Energy and (vi) Dark Matter. A new data analysis of the complete set of Pioneer data is announced in order to search for systematic effects or to confirm the unexplained acceleration. We also review the mysterious flyby anomaly where the velocities of spacecraft after Earth swing-bys are larger than expected. We emphasize the scientific aspects of this anomaly and propose systematic and continuous observations and studies at the occasion of future flybys. Further anomalies within the Solar system are the increase of the Astronomical Unit and the quadrupole and octupole anomaly. We briefly mention Dark Matter and Dark Energy since in some cases a relation between them and the Solar system anomalies have been speculated.

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“…These fly-bys, which are needed for going to deep space while keeping a low enough cost, are also used as ideal opportunities to gain information on the navigation anomalies which have been noticed at a number of recent planetary fly-bys [40][41][42]. Thanks to the availability of a precise radio-science and an accelerometer on board, the Odyssey spacecraft would have the unique capability of monitoring the dynamics during planetary fly-bys and to analyse the so-called "fly-by anomaly".…”

Section: Introductionmentioning

confidence: 99%